<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>

<div id="login_conteiner" class="ab_5">
    <form action="login" method="post">
        <input type="text" name="login" value="" />
        <input type="password" name="senha" value="" />
        
        <input type="submit" value="Enviar" />

        <p><c:out value="${erro}" default=""></c:out></p>
    </form>
</div>